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Iron serum test for people experiencing constant tiredness, weakness, and low energy levels

Blood Test for Constant Tiredness and Low Energy

Iron, Serum

Google
3,138 reviews
  • Pinpoint the cause of your fatigue
  • Reveal hidden iron deficiencies effortlessly
  • Clarify why you might feel weak
First results as soon as overnight*

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

90 day happiness guarantee

We stand behind our service

Prescription & fees included

Go directly to the lab, no extra fees

Easy to understand results

With friendly doctor's notes & guidance

Fast & convenient

Lab visit as quick as 10 mins in & out

What's this test for?

This test is ideal if you're experiencing unexplained fatigue, constant tiredness, weakness, or feeling worn down throughout the day. It helps identify iron deficiency and anemia that may be affecting your energy levels, physical performance, and overall well-being. Many people use this test when they suspect low iron is the reason behind their persistent exhaustion but want concrete answers.

How should I prepare for this test?

You should fast for 8-12 hours before your blood draw, and it's important to schedule your test in the morning. Iron levels naturally decrease by about 30% throughout the day, so morning testing ensures the most accurate results. Avoid eating any food before your appointment, but you can drink water.

What's included in this test?

Iron, Total

This test measures Total Iron in your blood, which reveals how much iron is circulating and available for your body to use. Iron is essential for producing hemoglobin in red blood cells, which carries oxygen throughout your body. Low iron can explain fatigue, weakness, and poor concentration, while high levels may indicate hemochromatosis or other storage disorders.

What happens after I get my results?
You'll receive detailed doctor notes in simple language explaining what your iron levels mean for your energy and overall health. These notes include personalized recommendations like dietary changes, iron-rich foods to add, supplement suggestions, or whether you should follow up with a healthcare provider. You'll also get the standard lab report and can track your iron levels over time using our trends feature to see how your dietary improvements or supplements are working.
When will I get my results?
Results are typically available within 1-2 business days after your blood sample is collected at the lab. You'll receive an email notification when your results are ready to view in your secure online account, along with easy-to-understand doctor notes and actionable next steps.
Who should consider getting this test?
This test is ideal for people experiencing persistent fatigue, weakness, or dizziness. It's especially important for women with heavy menstrual periods, pregnant women, vegetarians and vegans, athletes, and anyone with a history of anemia or iron deficiency. It's also useful for monitoring iron levels if you're taking iron supplements.
What symptoms indicate I may need this test?
Common signs of iron deficiency include constant tiredness and fatigue, weakness, pale skin, frequent headaches, dizziness, cold hands and feet, and shortness of breath during normal activities. You might also notice brittle nails, unusual cravings for ice or non-food items, or difficulty concentrating. If you experience these symptoms regularly, checking your iron levels can help identify the cause.
How can I naturally support healthy iron levels?
Eating iron-rich foods is key—include red meat, poultry, fish, beans, lentils, spinach, and fortified cereals in your diet. Pair iron-rich foods with vitamin C sources like citrus fruits, tomatoes, or peppers to boost absorption. Avoid drinking tea or coffee with meals as they can reduce iron absorption, and consider cooking in cast iron pans to add small amounts of iron to your food.
What does low iron mean?
Low serum iron means your body doesn't have enough iron circulating in your blood, which can lead to iron deficiency anemia. This makes it harder for your red blood cells to carry oxygen effectively, resulting in fatigue, weakness, and reduced physical and mental performance. Common causes include inadequate dietary intake, heavy menstrual bleeding, pregnancy, or poor iron absorption.
What does high iron mean?
High serum iron can indicate your body is storing too much iron, which may be caused by hemochromatosis (a genetic condition), repeated blood transfusions, excessive iron supplementation, or liver disease. Too much iron can be harmful as it accumulates in organs like the liver, heart, and pancreas. If your iron is high, your doctor may recommend additional tests and possible treatment to prevent organ damage.
How’s this work?
Getting your blood test with us is easy, private & backed by the power of science.

Long story short:
  1. In the test options, use the filters or search box to narrow your choices and find the test you want.
  2. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
  3. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
  4. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
  5. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
  6. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
  7. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!
  8. If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.
How do I know which test to get?
In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option.

Just text or call us at 754-799-7833, email us at [email protected], and we'll gladly help you. We've got your back and reply quickly.
Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?
Absolutely! We totally understand that errors can happen. No worries, we're here to help you.

Just reach out to us via text at 754-799-7833 or shoot us an email at [email protected]. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you.

There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out.

Our lab requires an address to be listed to generate an order.
Do you accept health insurance?
Only HSA & FSA is accepted.

Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts.

This policy applies to all insurance companies, including federal health insurance programs like Medicare.

If you have any questions, please text us at 754-799-7833 or email [email protected].
Can I cancel my order?
Yes.

We get it – sometimes your needs change.

As long as your samples haven’t been collected yet, we’re happy to help you cancel your order.

If you have any further questions, please text us at 754-799-7833 or email [email protected].

You can read more about our cancellation policy here.
How can I find a lab location near me?
During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp).

Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym.

If you have any questions, please text us at 754-799-7833 or email [email protected] and we'll gladly help you.

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

You get clinical lab reports & simplified health insights.
Save time & gas, go straight to the lab. Our doctors cover the rest.
Results start landing the next day after your lab visit.*
We don’t sell or share your data. Your time & privacy matter.
US-licensed doctors have your back if things get unclear.
No hidden fees, nice discounts for regular checkups.
Save a trip to the doctor, go directly to the lab
Instant orders, results often overnight*
Results explained in simple language
Reviewed by US licensed doctors
Fast & confidential, we never sell or share your data
No insurance needed, transparent pricing
Demo results
Iron, Total 42 mcg/dL
Demo results
Low Optimal 50 - 170 High
42 mcg/dL

What this means

Your iron levels are below the optimal range, which may explain feelings of fatigue, weakness, or difficulty concentrating. Low iron reduces your body's ability to transport oxygen efficiently, impacting your energy and physical performance. Addressing this through diet or supplementation can help restore your vitality.

* Regular blood test results (e.g., CBC) typically start arriving the next business day after sample collection. More complex tests, such as hormone panels, may take up to 10–15 business days due to their complexity.
Here’s how easy it is to get blood work done on your terms
Choose a checkup
Order your test Save a trip to the doctor. Your results will come with clear, friendly explanations. Takes 2 minutes
Book a lab
Book an appointment Visit any of our 4,000 nearby lab locations to have your samples collected. Book or walk-in
Choose a checkup
Get results Receive a clear, easy-to-digest health report by email & SMS within a few business days. Get answers, fast

Blood Test for Constant Tiredness and Low Energy

Google
3,138 reviews
  • Pinpoint the cause of your fatigue
  • Reveal hidden iron deficiencies effortlessly
  • Clarify why you might feel weak

1,000,000+ blood tests later, here's what our customers say

Google reviews 3138 reviews Next
Still got questions? Text our super-cool support team at 754-799-7833 to get help finding your ideal checkup.